package lab02.test36;

/**
 * 本科生
 */
public class Undergraduate extends Student {

    @Override
    String calGrade() {
//成绩等级
        String grade="";

        double avg=average();

        if (avg>=80&&avg<=100)
            grade="优秀";
        else if (avg>=70&&avg<80)
            grade="良好";
        else if (avg>=60&&avg<70)
            grade="一般";
        else if (avg<60&&avg>=50)
            grade="及格";
        else
            grade="不及格";

        return grade;
    }
}
